Carl bramming



C. BRAMMING. ELECTRIC CONNECTOR AND SWITCH.

APPLICATION FILED MAYa.1917. RzNEwED AUG. 8, |919.

1,320,834. Patented Nov. 4, 1919.

o rare raisin nain.

CARL BRAMMING, OF CHICAGO, ILLINOIS, ASSIGNOR 10 ACCESSORIES MANUFACTURING CO., A CORPORATION 0F ILLINOIS.

ELECTRIC CONNECTOR AND SWITCH.

Specication of Letters Patent.

Patented Nov. 4, 1919.

Application filed May 3, 1917, `Serial No. 166,235. Renewed August 8, 1919. Serial No. 316,203.

accompanying drawings, forming a partthereof.

The invention relates to' connectors especially adapted for use in automobile service, as for tail, cowl or spot lights, its obJect' being to provide a simple, comparatively ineX- pensive and efficient connector which ern-v bodies means for conveniently closing and opening the circuit. The -embodiment of the invention is hereinafter described and illustrated in the accompanying drawings in which-,-

Figure 1 is a side elevation of the device,

y partly broken away,

Fig. 2 is a central longitudinal section thereof, showing the circuit as closed,

. Fig. 3 is a similar view, showing the circuit open, and i Fig. 4 is a detail of the terminal and push member to which the line wire is attached. At 10 there is shown a tubular socket open at both ends and adapted to receive a plug connector 11, such as the base of an incandescent lamp, an ordinary bayonet joint being provided at 12 for securing the plug within the socket. The device is shown as arranged for the use of a single line circuit,

ment 13, adapted to coperate with a springadvanced plunger contact 14 telescopically fitting within a tube 15, extending through a guide plate and an abutment 16 of insulating material. The plate 16 may be attached rigidly to the tube, or the latter may be merely provided with a shoulder 17 at its end serving as a limiting stop for the plate. The plunger 14 is advanced by a spring 18 housed within it and reacting against. the farther closed end of the tube 15.

A plunger, shown as in the form of a plate 19, of insulating material, loosely'ts upon the tube 15, and a spring 2O reacts between it and the plate 16. Instanding lu s, as 21, 22, struck in from the wall of t e socket 10, and shown as located at its extreme end, limit the outward movement of the plunger 19 under the influence of the spring 20.

A metallic cap 23 telescopically lits over and slides upon the inner end of the socket member 10 andv is .centrally apertured to permitthe entry of theline wire 24. A

4plate of insulating material, 25, is seated within the cap 23, and while'loosely engaging it is without movement in service. EX- tending through and attached to the plate 25 isa contact element 26, apertured at its rearward end toreceive and hold the end of the leading-in wire, its inner end coperating with the closed end of the tube 15, these two elements constituting a pair of switch terminals. A pair of rigid fingers 27, 28, extend forwardly from the plate 25, andare of greater length than the contact element 26. For convenience of manufacture these fingers are formed of a single strip of metal bent to U form, its bowed portion` being apertured to lit upon the contact element 26, to which it is rigidly secured.`

The cap 23 is removably attached to the socket 10 by a form of bayonet joint, com- "prising a pair of slots, as 29, formed in the wall of the socket and each being provided at its outer end with an inwardly facing shoulder 30 and with an oblique channel 31 and a pair of studs, as 32, 33, projecting inward y from the side wall `of the cap and being substantially longitudinally alined. The edge of the oblique portion 31 of the slot 29 which is remote from the shoulder 30 inclines in the' opposite direction toward its inner end, as shown at 34. As the cap is applied to the socket the studs 32, 33, succes-- sively enter the oblique portion 31 of the slot, the forward stud being guided'by the oblique edge 34 acting as a cam to turn the cap and bring the studs into line with the shoulder 30. As the cap is applied to the socket the fingers 27, 28, advance the plunger lplate 19, compressing the spring20, the plunger sliding upon the tube 15 and the contact element 26 presently coming into engagementwith its end and thus vclosing the circuit. Pressure upon the cap being relieved, the rearward stud 33 engages the shoulder 30 and holds the cap against further outward movement, maintaining the switch terminals in contact. In order to open the circuit the cap is slightly turned to disengage the stud 33 from the shoulder 30,

whereupon the springs force it backwardly, this stud traveling through the oblique portion 31 of the slot and guiding the advance stud 32 into engagement with the stop shoulder, and thus preventing the complete separation of the parts. If desired bosses, as 35,'36, may be struck'in on the body' of 'the socket to limit the outward movement of the 'plate 16 when the plug 11 is removed.

When the device is used in connection with a lamp the socket 10 will be fixed. When it is used to carry a lamp upon a wall surface, suchvas the cowl of an automobile, the 'cap 23 may be fixed.

While the preferred embodiment of the invention o is illustrated and described, changes of detail may be made without departing from its-scope, as, for example, the form of the pusher element interposed between the cap and the plunger 19, herein shown as a pair of lingers.

The particular Iform of bayonet joint for holding the cap in two positions is not material, though that shown is efficient and satisfactory.

I claim as my' invention-e 1. In a combined electricI connector and switch, in combination, two telescopically spring-retracted plunger slidable on the connect'or element, apusher element within the tubular member having a leading-in wire terminal engageablel with the`plunger, and means for holding the terminal in two positions with reference to the socket element.

2. In acombined electric connector and switch, in combination, a socket for receiving' a plug connector, a guide plate slidable in the socket, a tube extending through the guide plate, a spring-extended contact plunger telescopically carried by the tube, a spring-retracted plunger plate slidable on the tube, a cap slidable upon the socket, means for holding the cap in two positions, a line wire terminal carried by the cap and engageable .with the end of the tube, and fingers carribd by the vcap for bearing on the plunger plate.

. CARL 'BRAMMING- 

